$250,000 rewards in 'vicious and horrible' murders

THOSE who help solve either of two horrifying Queensland murders could be paid $250,000 if the information leads to a conviction.

Queensland Police Minister Jack Dempsey said the cash offer could help catch those responsible for "vicious and horrible acts" which include the killing of 23-year-old Mackay woman Shandee Blackburn last year and the murder of Julian Neuendorf in late 2012.

Ms Blackburn was found collapsed on Boddington St on February 9 last year, having been repeatedly stabbed. She was taken to Mackay Base Hospital but died soon after.

Ms Neuendorf's remains were found in the Logan River near the Logan Reserve boat ramp at Henderson Park at 9.15am on Friday November 2, 2012.

Police believe her white handbag with a silver skull on the side was stolen in the attack.

"Our hope is that by offering these rewards it will encourage people to come forward with the vital information detectives need," he said.

Anyone with information which could assist police is asked to contact: